Authorities searched the home of a man who used to work at a motel near where the bodies of four prostitutes were found in a drainage ditch last fall, according to a law enforcement official.

The search began Monday, and continued into Tuesday morning at a house in Alloway Township, Salem County.

The owner of the house is a former employee of the Golden Key Motel, one of a string of seedy motels on the Black Horse Pike just outside of Atlantic City where the bodies of the women were found on Nov. 20.

Authorities are trying to determine if a serial killer is responsible for their deaths.

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The owner of the home was questioned repeatedly by police, but is not in custody and has not been charged with a crime, according to the law enforcement official who spoke on condition of anonymity because of the ongoing investigation.

Officers from several law enforcement agencies spent about six hours at the house on Monday and searched the interior. They returned Tuesday morning to continue searching the house, as well as several smaller buildings outside it, the law enforcement official said.

Two of the four women found were murdered; autopsies could not determine the cause of death for the other two because they had been in the ditch for so long. No arrests have been made.

The victims were Kim Raffo, 35, a Brooklyn native who lived in Florida before coming to Atlantic City; Tracy Ann Roberts, 23, of Philadelphia, a former exotic dancer forced to the streets after drugs wrecked her looks; Barbara V. Breidor, 42, of Ventnor, who helped run her parents' business before developing a drug problem, and Molly Jean Dilts, a chubby-cheeked 20-year-old from Blairsville, Pa., who had been working the streets for a short time before she disappeared.